Boats are for sissies! achievement

This achievement was proposed in the past, but has been rejected, because of the overlap with water/underwater geohashes, and other comments left unaddressed. Please read the discussion page for more details.

As per the page proposed achievements: If an achievement has strong opposition and the reasons for opposition are not resolved through discussion, then the proposed achievements category is replaced with the rejected achievements category, the reason explained succinctly on the page, and the page otherwise marked to make sure it isn't confused with an achievements page.

Only the bravest of heart can claim this achievement, by reaching a water geohash without a watercraft. Waterskiing, or otherwise being attached to a boat, also disqualifies you. If you start from a boat, you must swim (or at least drift and tread water) for at least 10x the margin or error of your GPS device. The geohasher may wear a life jacket or other safety floatation device if the body of water justifies it.